I'd include a screenshot of my desktop, but I'm afraid to shock you all. I will describe it for you though, if I can find the words. I believe it is called "Windows.jpg" - it's basically the standard blue Windows desktop background, with the little flying window in the background. That's it. When I first got my desktop there was an Alienware logo on the desktop, because that's how the folks who built it had set it up. Once I rebuilt the machine though, that went away. I even got crazy once and set my desktop to all black (no not the All Blacks), but to be honest I just don't care.
See, I don't spend a lot of time staring at an empty desktop. If I'm at my computer I'm either working or gaming, what do I care what the desktop looks like? If I want to look at a picture, I'll open that up - otherwise I just don't care.
Things I miss post Cataclysm
Uh - a Worgen PC free world? The cries of gnomes everywhere that wished they had a capital city that wasn't overrun by troggs and irradiated gnomes? Jousting (just kidding)?
I don't really miss anything in the game world, except maybe BoL transferring 100% of my heals. The game changes, and I didn't spend a lot of time in the Eastern Kingdoms or Kalmidor once BC/WotLK launched. Call me unsentimental, but there's really no point saying "oh don't you wish it was still like back then".
Tomorrow - my favorite spots (in and out of the game). Guess which one will be longer?